1 files changed, 25 insertions, 9 deletions
diff --git a/synapse/app/__init__.py b/synapse/app/__init__.py
index c3afcc573b..f56f5fcc13 100644
--- a/synapse/app/__init__.py
+++ b/synapse/app/__init__.py
@@ -12,22 +12,38 @@
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
-
+import logging
import sys
from synapse import python_dependencies # noqa: E402
sys.dont_write_bytecode = True
+logger = logging.getLogger(__name__)
try:
python_dependencies.check_requirements()
-except python_dependencies.MissingRequirementError as e:
- message = "\n".join([
- "Missing Requirement: %s" % (str(e),),
- "To install run:",
- " pip install --upgrade --force \"%s\"" % (e.dependency,),
- "",
- ])
- sys.stderr.writelines(message)
+except python_dependencies.DependencyException as e:
+ sys.stderr.writelines(e.message)
sys.exit(1)
+
+
+def check_bind_error(e, address, bind_addresses):
+ """
+ This method checks an exception occurred while binding on 0.0.0.0.
+ If :: is specified in the bind addresses a warning is shown.
+ The exception is still raised otherwise.
+
+ Binding on both 0.0.0.0 and :: causes an exception on Linux and macOS
+ because :: binds on both IPv4 and IPv6 (as per RFC 3493).
+ When binding on 0.0.0.0 after :: this can safely be ignored.
+
+ Args:
+ e (Exception): Exception that was caught.
+ address (str): Address on which binding was attempted.
+ bind_addresses (list): Addresses on which the service listens.
+ """
+ if address == '0.0.0.0' and '::' in bind_addresses:
+ logger.warn('Failed to listen on 0.0.0.0, continuing because listening on [::]')
+ else:
+ raise e
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